I'm planning on some major renos to my first floor which include removal of walls, relocation of the kitchen, changing a patio door to windows and a bay to patio doors, electrical, plumbing and ducts will be affected.

Where do I start? Do I find an architect first? A general contractor? A kitchen designer? An interior designer? None of my family or friends have done anything major so I don't have any personal referrals. I have lots of ideas (especially great ones from here) but I'm not much of a DIYer, nor is DH. I live in the Toronto area so any input or recommendations would be greatly appreciated. Thanks